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Preparation method and product of nitrogen-doped carbon nano-tube

A nanotube and nitrogen-carbon technology, applied in the nano field, can solve the problems of difficulty in practical industrial production, difficulty in obtaining nitrogen-doped carbon nanotubes, complicated preparation process, etc., achieving strong sustainability and realizing large-scale production and preparation. simple craftsmanship

Active Publication Date: 2014-12-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In the existing methods, it is often necessary to use a substrate to regulate the growth of nanotubes to obtain nitrogen-doped carbon nanotubes with specific properties (such as: nanotubes with a specific arrangement), and the preparation process is complicated, and the regulation method has certain limitations. , it is difficult to put into actual industrial production
In addition, nanotubes prepared without substrates often have curls, and it is difficult to obtain nitrogen-doped carbon nanotubes uniformly distributed in a large area, which is difficult to meet the needs of modern industry and technological development.

Method used

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  • Preparation method and product of nitrogen-doped carbon nano-tube
  • Preparation method and product of nitrogen-doped carbon nano-tube
  • Preparation method and product of nitrogen-doped carbon nano-tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The preparation method of nitrogen-doped carbon nanotube in the present embodiment, carries out following operation successively:

[0042] (1) prepare the compound of melamine oxalate and cobalt oxalate

[0043] Add 50mL of water and 1.575g of oxalic acid into a 100mL round bottom flask, stir to dissolve. Add 0.5948 g of metal salt (in this example, cobalt chloride hexahydrate). The reaction was stirred for 10 min. Add 1.26 g of melamine, reflux at 92° C. for 6 h after adding, then carry out suction filtration, washing, and drying to obtain a composite of melamine oxalate and metal oxalate (cobalt oxalate in this example). In this embodiment, the molar ratio of water: oxalic acid: melamine: metal salt is 278:5:4:1 (the crystal water in the metal salt is free water, which is not included in the molar amount of water).

[0044] In this embodiment, what is obtained after reflux is a suspension, the concentration of melamine oxalate in this suspension is 0.2mol / L, and th...

Embodiment 2

[0052] The preparation method of the nitrogen-doped carbon nanotubes of this embodiment is the same as that of Example 1, except that the water added in step (1) is 100 mL, that is, the molar ratio of water: oxalic acid: melamine: metal salt is 556:5: 4:1.

[0053] What obtain after reflux among the present embodiment is suspension, the concentration of melamine oxalate in this suspension is 0.1mol / L, the mol ratio of the melamine oxalate that obtains after further suction filtration, washing, drying and cobalt oxalate is 4:1.

[0054] The morphology of the nitrogen-doped carbon nanotubes prepared in this example is as follows: Figure 4 shown, where Figure 4 (a) and (b) have different resolutions. It can be seen from the figure that the nitrogen-doped carbon nanotubes in this example have a length of more than 100 μm, a diameter of about 100 nm, and a bamboo-like structure without curling, and are evenly distributed within the range of 200 μm×150 μm.

Embodiment 3

[0056] The preparation method of nitrogen-doped carbon nanotubes in this embodiment is the same as that in Embodiment 1, except that the metal salt in step (1) is nickel chloride hexahydrate, and correspondingly, the obtained metal oxalate is nickel oxalate. And the quality of the added metal salt is 0.5940g, to ensure that the molar ratio of oxalic acid in this embodiment: water: metal salt: melamine is the same as that in Example 1.

[0057] What obtain after reflux among the present embodiment is suspension, the concentration of melamine oxalate in this suspension is 0.2mol / L, the mol ratio of the melamine oxalate that obtains after further suction filtration, washing, drying and nickel oxalate is 4:1.

[0058] The morphology of the nitrogen-doped carbon nanotubes prepared in this example is as follows: Figure 5 shown, where Figure 5 (a) and (b) have different resolutions. It can be seen from the figure that the nitrogen-doped carbon nanotubes in this example have a le...

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Abstract

The invention discloses a preparation method and a product of a nitrogen-doped carbon nano-tube. The preparation method comprises the following steps: performing calcination on a precursor under a nitrogen atmosphere, and performing acid treatment after calcination to obtain the nitrogen-doped carbon nano-tube, wherein the precursor is a compound of carboxylate of organic amine and metal carboxylate; the carboxylate of organic amine is melamine carboxylate or dicyanodiamide; the length of the nitrogen-doped carbon nano-tube is more than 5 microns, and the tube diameter of the nitrogen-doped carbon nano-tube is 50-500 nanometers. The preparation method disclosed by the invention is simple, is wide in raw material source and strong in sustainability, can be used for obtaining the nitrogen-doped carbon nano-tubes which are uniformly distributed in a large area range, and is expected to achieve large-scale production; and the modification on surface functional groups can be completed in one step by virtue of calcination without implementing subsequent complex modification processes.

Description

technical field [0001] The invention relates to the field of nanotechnology, in particular to a method for preparing nitrogen-doped carbon nanotubes and products thereof. Background technique [0002] With the discovery of carbon nanotubes in 1991, scientists have increasingly realized the important position of carbon nanotubes in scientific development and human progress. Carbon nanotubes have extraordinary mechanical and electrical properties, and have broad application potential in the fields of emission sources, hydrogen storage, energy storage / conversion, and microelectronics. Scientists have worked hard for many years to develop simple and reliable methods for preparing high-quality carbon nanotubes. Due to the needs of electronic devices and composite materials, the controllable preparation of carbon nanotubes is a goal that scientists are striving to achieve. At present, the methods for preparing carbon nanotubes mainly include arc method, laser evaporation and con...

Claims

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Application Information

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IPC IPC(8): C01B31/02B82Y30/00
Inventor 王勇王世萍韩传龙王世国王静肖冰洋
Owner ZHEJIANG UNIV
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